/*
 * Copyright 2021 DataCanvas
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.dingodb.calcite.grammar.ddl;

import io.dingodb.common.partition.PartitionDetailDefinition;
import org.apache.calcite.sql.SqlIdentifier;
import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlOperator;
import org.apache.calcite.sql.SqlSpecialOperator;
import org.apache.calcite.sql.SqlWriter;
import org.apache.calcite.sql.parser.SqlParserPos;

public class SqlAlterTableAddPart extends SqlAlterTable {

    public PartitionDetailDefinition part;

    private static final SqlOperator OPERATOR = new SqlSpecialOperator("ALTER TABLE ADD PARTITION",
        SqlKind.ALTER_TABLE);

    public SqlAlterTableAddPart(SqlParserPos pos, SqlIdentifier sqlIdentifier, PartitionDetailDefinition part) {
        super(pos, sqlIdentifier, OPERATOR);
        this.part = part;
    }

    @Override
    public void unparseAlterOperation(SqlWriter writer, int leftPrec, int rightPrec) {
        writer.keyword("ALTER TABLE");
        this.table.unparse(writer, leftPrec, rightPrec);
        writer.keyword("ADD PARTITION");
        if (part.getPartName() != null) {
            writer.keyword(part.getPartName());
        }
        writer.keyword("VALUES LESS THAN(");
        int i = 0;
        int opSize = part.getOperand().length;
        for (Object operand : part.getOperand()) {
            if (operand == null) {
                writer.keyword("null");
            } else {
                writer.keyword(operand.toString());
            }
            if (i < opSize - 1) {
                writer.keyword(",");
            }
            i ++;
        }
        writer.keyword(")");
    }
}
